ABSTRACT
Objective To study the chemical constituents from the aerial parts of Hypoestes phyllostachya. Methods The compounds were isolated and purified by silica gel column chromatography, MCI, and HPLC. Their structures were elucidated by spectroscopic analysis. Results Eighteen compounds were isolated from 95% ethanol aqueous extract of H. phyllostachya and the structures were identified as (3R,6R,7E)-3-hydroxy-megastigma-4,7-dien-9-one (1), (3S)-3-hydroxy-β-ionone (2), (3S,5R,6S,7E)-5,6-epoxy-3- hydroxy-megastigma-7-en-9-one (3), grasshopper ketone (4), vomifoliol (5), (+)-dehydrovomifoliol (6), loliolide (7), 2,6-dimethyl- 2E,7-octadien-1,6-diol (8), bifurcanol (9), (12S)-hydroxygeranylgeraniol (10), nectandrin B (11), N-trans-feruloyltyramine (12), syringylethanone (13), paeonol (14), vanillin (15), dehydrozingerone (16), 2-hydroxybenzyl alcohol (17), and (2E)-4-hydroxy-2- hexenoic acid (18). Conclusion All compounds are isolated from this plant for the first time.
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Objective To investigate the chemical constituents of the whole plants of Viola yedoensis. Methods The chemical constituents were isolated and purified by column chromatography over silica gel and Sephadex LH-20, as well as on the semi-preparative HPLC. The structures of the isolates were identified by the NMR spectroscopic method. Results Twenty-three compounds were isolated and their structures were identified as pubinernoid A (1), (2R,6R,9R)-2,9-dihydroxy-4-megastigmen-3-one (2), 3S,5R-dihydroxy-6R,7-megastigmadien-9-one (3), dehydrovomifoliol (4), blumenol A (5), blumenol B (6), oleanolic acid (7), 2α,3α-dihydroxyurs-12-ene-28-oic acid (8), 1α,2α,3β-trihydroxyolean-12-ene-28-oic acid (9), 2α,19α-dihydroxyursolic acid (10), 3α-hydroxyfriedel-2-one (11), 7-oxopetrosterol (12), 7-oxositosterol (13), syringaresinol (14), lariciresinol (15), daphneticin (16), umbelliferone (17), trans-p-hydroxycinnamic acid methyl ester (18), p-hydroxyphenylpropionic acid (19), p-hydrobenzaldehyde (20), p-methoxybenzaldehyde (21), p-methoxybenzoic acid (22), and 5-hydroxymethyl-2-furfural (23). Conclusion Compounds 1-16 and 18-23 are isolated from the genus Viol for the first time, and compound 17 is isolated from the plant for the first time.
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OBJECTIVE: To isolate and identify the chemical constituents from Cynodon dactylon. METHODS: The chemical constituents of the alcohol extract of C. dactylon. were isolated and purified by various chromatography methods, and their structures were identified by physical and chemical properties and spectral data. RESULTS: Fourteen compounds were isolated from C. dactylon and their structures were examined by physicochemical characteristics and spectral data and identified as vanillin (1), arctigenin (2), maltol (3), (+)-dehydrovomifoliol (4), (3R, 6R, 7E)-3-hydroxy-4, 7-megastigmadien-9-one (5), (-)-loliolide (6), zhebeiresinol (7), 1-indole-3-carboxaldehyde (8), ferulic acid (9), matairesinol (10), pinoresinol (11), ethyl caffeate (12), traxillagenin (13), and impecylenolide (14). CONCLUSION: Compounds 1-14 are isolated from C. dactylon for the first time.
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Objective: To study the non-alkaloids from the 70% ethanolic extracts of Phellodendri Cortex. Methods: A variety of 732 cation exchange resin chromatography, D101 macroporous adsorbent resin chromatography, silica gel chromatography, ODS column chromatography, Sephadex LH-20 chromatography, and preparative HPLC methods were used for the separation and purification of chemical composition. Their structures were established on the basis of physicochemical properties and spectral analysis. Results: Fourteen compounds were identified as (-)-3-O-feruloylquinic acid methyl ester (1), (-)-4-O-feruloylquinic acid methyl ester (2), (-)-chlorogenic acid methyl ester (3), (-)-5-O-feruloylquinic acid methyl ester (4), salidroside (5), methyl ferulate (6), caffeic acid methyl ester (7), p-hydroxylbenzyl ethanol (8), 3,4,5-trimetoxyphenol-O-β-D-glucopy ranoside (9), 2-methoxy-4- (2-propenyl) phenyl β-D-glucopyranoside (10), tachinoside (11), methyl syringate (12), (6S)-dehydrovomifoliol (13), and (6R,7aR)- epiloliolide (14). Conclusion: Compounds 9-14 are isolated from the plants in this genus for the first time.
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Objective: To study the chemical constituents in 60% ethanol extract from the aerial parts of Matteuccia struthiopteris. Methods: Diaion HP20 macroporous adsorption resin column chromatography (CC), silica gel CC, ODS CC, Sephadex LH-20 CC, and PHPLC were used for the isolation and purification. Structures were identified on the basis of chemical evidences and spectroscopic analyses. Results: Twelve compounds were isolated and identified as 4,7-megastigmadiene-3,9-diol (1), blumenol A (2), dehydrovomifoliol (3), bridelionol F (4), bridelionol B (5), 3,5,6-trihydroxy-7-megastigmen-9-one (6), 5β,6α-dihydroxy-3β-(β-D- glucoyranosyloxy)-7-megastigmen-9-one (7), byzantionoside A (8), dearabinosyl pneumonanthoside (9), 3-hydroxy-β-damascone glucoside (10), amarantholidoside IV (11), and icariside C3 (12). Conclusion: Compounds 1-12 are reported from the plants of Matteuccia Todaro for the first time.
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OBJECTIVE: To study the chemical constituents of the sterile fronds of Osmunda japonica. METHODS: The 95% ethanol extract of the sterile fronds of Osmunda japonica was partitioned with. Eight compounds were isolated by column chromatography from ethyl acetate part, and their structures were identified by analysis of NMR and MS data. RESULTS: The compounds were identified as; (+)-dehydrovomifoliol (1), p-hydroxybenzylideneacetone (2), 3′, 4′-dihydroxybenzylideneacetone (3), protocatechuicaldehyde (4), protocatechuic acid (5), p-hydroxy-benzaldehyde(6), 15-nonacosanone (7), and β-sitosterol (8). CONCLUSION: Compounds 1, 2, 4, 6, and 7 were obtained from the genus Osmunda for the first time.